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B. F. MARTY..

STARTER FOR HYDROCARBON ENGINES.

APPLICATION FILED MAR. 3I, l9l9.

Patented Oct. 21, 1919.

2 SHEETSSHEET 1.

MW 3i .BY

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B. F. MARTY.

STARTER FOR HYDRO'CARBON ENGINES.

APPLICATION FILED MAR. 31. 1910.

LRN WBD Patented Oct. 21,1919.

2 SHEETS-SHEET 2.

[Al VE/V 70R ATTORNEY.

'EENJMTIN l5. EMRTY, 01E HIGHLAND PK, MICHIGAN, ASSIGNOR 01E ONE-THIRD T0 'WILLIMH A. TY, 01E H IG HLMD PARK, MICHIGAN.

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Patented oer. er, tore.

Application filed March 31, 2 1919. Serial. l lo. 2%,40e.

To all whom it may concern: I

Be it known that l, BENJAMIN l MARTY, a citizen of the United States, residing at Highland Park, county of Wayne, State oi Michigan, have invented a certain new and useful Improvement in Starters for Hydrocarbon-Engines, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to starting mecha nism for hydrocarbon engines, and has for its object an improved organization of parts by means of'whioh the engine may be started with a, minimum expenditure ofefi'ort, and with an avoidance or the shock that occurs in the use or some mechanisms due to the sudden beginning of rotative movement of the driving pinion when its rotation with the motor shaft begins. I approach the solution of the problem along the line of interposing a yielding element in the driving mechanism). between that end thereof which is connected with the motor shaft and that which is connected with the driven member.

In the drawings:

Figure 1 is a longitudinal elevation, partly in section, of my improved mechanism, showing the driving pinion in almost complete mesh with the gear teeth on the fly wheel.

Fig. 2 is an end elevational view partly in section along the line 2-2 of Fig, 1.

Fig. 3 is an enlarged longitudinal elevation showing the driving pinion in dotted outline free from th fly wheel and held against rotation by the engagement of the detent pin.

Fig. lis a detail view of one end of the shaft, about which the helical spring engages, the view being taken iromabove as contrasted with the showing of this part in Fig. 3.

Fig. 5 is a cross-sectional view of the shaft and its inclosing sleeve, along the line 5-5 of Fig.

lt ig. dis a detail perspective of the driving pinion.

Fig. is a side elevational View of this driving pinion, bringing out the relation of the spiral spring groove thereto.

A represents an inclosing shell or housing, in one end of which is journaled the end of the shaft B, whose opposite end may be operatively connected with the motor, either directly or as a countershaft connected therewith by gearing. At one end of the shaft B is a collar D, which is fixed, by means of screwsor rivets F, to the end of the sleeve E, which engages about the shaft B, than which, however, it is appreciably shorter to provide for possible longitudinal movement of the sleeve in case the driving pinion rebounds from the fly wheel. Helically engaging about the sleeve Eis the small diametered end G of the spring J, Whose large end H spacedly engages about that portion of the shaft not normally covered by the sleeve E, and which is anchored at its end to pins or studs K on the fixed collar L on the shaft B. The end of the spring section G adjacent the collar D is recessed or indented as at N for the engagement therein of the projecting portron M of the collar, to hold it against undesired movement with respect to the collar D and sleeve E.

At l? is shown the longitudinally bored whose.internal helical groove the small spring G slidably engages. As shown paras it, is shown in Fig. 6 as cut away as to a portion of its periphery along such helical lineas to substantially correspond with the wave lengths of the spring G, while a sharp shoulder S is formed oppositely to this out away portion, foren agement against the correspondingly sloped side of the pro ection M on the collar B. When in the position shown in Fig. 1 the teeth Q of the driving pinion 1P mesh with the gear teeth of the fly wheel 'l. Depending from a suit ably located portion of the housing A is a detent or stop member U, whose end is adapted to engage between the teeth Q of the driving pinion P, when, by the operation of the mechanism as hereinafter deand helically grooved driving pinion which engages about the sleeve E, and through scribed, it has been moved lengthwise ofthe the engagement of the detent U with the teeth of the driving pinion P, the pinion would also tend to rotate with it. But being thus held against rotation, it is drawn longitudinally of the sleeve E and shaft B by the rotary movement of the section G of the spring, Whose indented end N, as heretofore explained, is engaged by the projection M of the collar D, until its teeth Q mesh with the teeth on the periphery of the fly wheel T. By the time the driving pinion P is no longer engaged by the detent U it is sufliciently in mesh with the teeth of the fly wheel T to be held thereby against rotation, until the turning of the shaft B and sleeve E has progressed through half or three quarters of a full rotation, by which time the shoulder S on the driving pinion has engaged the side of the projection M on the collar C. Further rotation of the shaft and sleeve may be kept up until such a tense condition has been brought about in the spring that the fly wheels inertia has been overcome and its rotation effected.

WVith the rotation of the fly wheel started, the spring tends to return to its normal unstrained condition and the greater peripheral size of the fly wheel relatively to that of the driving pinion aids this largely. The influence of the spring against the internal helical groove Y of the driving pinion causes its travel lengthwise of the shaft B and sleeve E in the opposite direction to that just described, until its teeth Q are free from engagement with the fly wheel and are once more engaged by the detent U. The stop I on the sleeve E serves to halt the travel of the driving pinion too far along the sleeve; this is effected by the engagement of the shoulder S of the cut away end portion of the driving pinion against this stop. The driving pinion is now in the position from which it started to move into mesh, with its teeth engaged by the detent U and the rotative actuation thus imparted to the fly wheel is suflicient to get the engine started to effect the initial sucking in of the charge, its compressionand explosion within the cylinders.

hat I claim is 1. In a. starter for hydrocarbon engines, in combination with a shaft member operatively connected withv the engine, a. sleeve member slidably engaging thereover, a helical spring member connected at one end with said shaft member, a driving pinion engy" ing about said spring and sleeve members and. capable of axially longitudinal movement with respect thereto, a fly Wheel with whose peripheral teeth the teeth of said driving pinion are in mesh in certain positions of said driving pinion on said sleeve, and a stop member for engaging the teeth of said driving pinion when it has moved from its normal position relatively to said fly wheel.

2. A starter for hydrocarbon engines, having, in combination with a rotatable shaft, a helical spring member, one end of which is anchored, spacedly engaging thereabout, a fly wheel, a driving pinion whose teeth are adapted to operatively engage those of the fly wheel ,at certain positions thereof lengthwise of said shaft, a stop memberfor holding said driving pinion against further rotative movement when freed from engagement with said fly wheel, and a sleeve member slidably engaging about said shaft and having operative engagement with the free end of said spring.

3. The combination, with a rotatable shaft, of a sleeve member, a spring member one end of which is adapted to be operatively connected with said sleeve member and the other end being anchored against movement of the spring as a whole when ably engaging about said shaft and the first mentioned end of said spring member, a fly wheel member with whose teeth the teeth of said driving pinion are adapted to mesh at certain positions thereof relatively to sald shaft and said sleeve member, and a detent member for halting the rotative movement of said driving pinion when the same has moved out of engagement with said fly Wheel.

4. In a starter for internal combustlon engines, the combination. of a rotatable shaft, a sleeve member'slidably and rotatably engaging thereabout, a spiral spring member one end of which is fixed 1n posltion and the other end of which is adapted to be operatively connected with the adjacent end of said sleeve member, a driv ng pinion rotatably engaging about sald spring and said shaft and adapted to operatively engage the end portion of said sleeve, afly wheel having a peripherally toothed port on with which the teeth of said driving plnion are adapted to engage, and a detent member for halting the further rotative movement of said driving pinion when the same has moved out of engagement with said fly wheel.

5. In combination with a rotatable shaft,

a sleeve member loosely engaging there emme member, a driving pinion member capable of operative engagement with said sleeve at a certain phase of each cycle of operations, and a fly Wheel With which said driving pinion member is adapted to be in operative engagement during a portion of each cycle of operations.

In testimonywhereof I sign this specification in the presence of two Witnesses.

BENJAMIN F. MARTY.

Witnesses JEFFERSON C. THURBER, WILLIAM M. SWAN. 

